10th Class Mathematics Related to Competitive Exam Question Bank Commercial Mathematics

  • question_answer
    A sum of money at compound interest amounts to Rs. 10580 in 2 years and to Rs. 12167 in 3 years The rate of interest per annum is           

    A)  12%                                      

    B)  14%

    C)  15%                        

    D)         \[16\frac{2}{3}%\]

    Correct Answer: C

    Solution :

      Interest on \[Rs.\text{ }10580\]for 1 year \[=Rs.(12167-10580)\]                 \[=Rs.1587\] \[\therefore \]   Rate \[=\left( \frac{100\times 1587}{10580} \right)%=15%\]


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